Pump



March 19, 1940. D. MATHEsoN 2,193,930

y PUMP Filed Nov. 14, 1958 4 Sheets-Sheet l e M m .Wl 1 W wf la l M w f n Q Y w INVENTOR DCI/NLC? Mtl. f/LSOT( @M1/ Attorney March 19,` 1940. D. MATHESON PUMP Filed NOV. 14, 1958 4 Sheets-Sheet 2 lNvENroR l DanLe Na/son @M Attorney March 19, 1940. D. MATHx-:soN

PUMP

Filed Nov. 14, 1938 4 Sheets-Sheet 3 |NVENT0R Danie] NaZL/CSOTL Attorney 19, 1940. D, MATHESQN 2,193,930

PUMP

Filed Nov. 14, 1958 4 Sheets-Sheet 4 INVENTOR Dane] Naf/65071,

Attorney n Patented Mar. 19, 1940 PATENT orties,

PUMIP Daniel Matheson, Vandura, Saskatchewan, Canada Application November 14, 1938, Serial No. 240,366

. e claims. (C1. e- 214) l This invention relates to new and useful impending of course upon the normal Water 'level proveniente in a double acting Water pump. lts primary object being to design and construct a reciprocal waterwpump having a manually op 5 erated rotary crank by means of which the same is actuated.

A further, object of theinvention is to construct a pump cylinder having a reciprocal piston therein, said piston and cylinder being del0v signed to raise Water` through the outlet pipe on each stroke either up or down.

Another object of the invention isto provide means to reciprocate the plunger rod up and down from the continuous rotary motion of the crank by an automatic gear shift associated with the toothed racks, pinion and rotary crank.

With these and other objects in view that may appear while the description proceeds the invention consists in the novel construction and arrangement of parts as hereinafter more spee accompanying drawings forming part` of this application and in which:

Fig. l is a general View of the pump assembly. Fig. 2 is a detail View of the automatic gear change device.

Fig. 3 is a cross-sectional view of the slidable crank support.

Fig. 4 isv a cross-sectional View of the check. Fig. 5 is a detail view of a manually operated gear change device.

Fig. 6 is a modication of the manually operated device.

Fig. 7 is a plan View of the same. Fig. 8 is a side elevation of the modification shown in Figs. 6 and 7.

Fig. 9y is a detail vievT of the movable shaft end. Referring more in detail to the drawings in which similar reference characters designate corresponding parts throughout the several views it will beseen the invention comprises a cylinder I0 having an inlet and outlet aperture Il in the bottom andan inlet l2 and outlet i3 in the top. A packing gland i4 is also provided in the top. The piston vl5 which is equipped with Washers I6 is reciprocally mounted in the cylinder it. A piston rod il is secured to the Said piston and extends up through the said packing gland Hl. The cylinder intakes and outlets are equipped with pipes I3 having check valves i9 associated therewith and arranged to permit the flow' of Water in one direction only. The cylinder is susN pended in the well by supports 2li at a convenient water level as illustrated in Fig. 1, de-

cifically set forth, claimed and shown in 'the in the Well. v l

The pump mechanism comprises a pair of toothed racks` 2i engaging a pinion 22. Said racks are connected to the piston rod by a cross member 23. A corresponding member 2d at the upper endholds the racks in parallel relation to each other. A guide structure 25 is mounted on the support 26. The crank El is also supported on the support 2t in bearings it secured on a block 29 which is slidably mounted in the support 25 by dove-tail yguides The block is actuated manually by a lever 3i pivoted to the support 26. By moving the block the pinion 22 which is mounted'on the saidcranl: 2l, is moved from one rack to the other thus changing the direction of the travel of the pump piston. In Fig. 2, an automatic gear changinge device is shown. This comprises angularly disposed cross members 32 mounted on the racks 2i.' These are arranged to engage a roller 33 on theshait of the crank 2l when the piston is approaching the end of its stroke. This engagement causes the pinion to be automatically moved laterally in its support to engage the opposite rack thereby lchanging the direction of travel and at the same time providing a continuous rotary motion for the crank 21. v

In the modification shown in Figures 6 `to 9, the crank 21 is formed With a long shaft 35 Which is rotatably mounted at the` forward end in a frame 36 and at the rear end in a movable link member 31 passing through an elongated horizontal slot 38 in the frame The lever 3| is hinged to the support 26 and the link 31 is pivotally connected thereto to be actuated to' move the shaft 35 from one side to the other manually as desired. This movement carries the pinion 22 from one toothed rack to the other and consequently reverses the direction of operation. A block 3S is carried by the shaft 35 and a spring Mlis arranged to bear againstthe same. Said spring is also engaged to a side frame member M. which is permanently secured to the frame 36 and to the support 2E.

The action of the spring normally urges the pinion into engagement With one of the racks and reduces the amount` of manual eiort necessary to operate the device since the lever 3l will be pushed over and held against the spring tension during I'one-half the pump cycle then released for the other half.

A locking means is provided to keep the pinion in neutral position with respect to the racks. This 'consists of a 'pivotally mounted rod 42 pivoted to a bracket 43 mounted on the frame 36. Said rod has a notch M formed on the underneath side thereof which engages a cross member 45 on the block 39, in a manner to hold the pinion midway between the racks against the tension of the spring 40.

From the foregoing it will be seen as the crank is rotated the piston is reciprocated in the cylinder. The Water is drawn in rst in one end then in the other. While the water is being drawn in at the one end it is being forced out at the other and by means of a system of check valves the water enters the outlet pipe 34 and from then to the outlet 35.

It is believed that the construction and advantages of the structure shown may be apparent from the foregoing paragraphs taken conjunction with the accompanying drawings without further detailed description.

While the preferred embodiment of the invention has been disclosed it is understood that minor changes in the details of construction, combination and arrangement of co-operating parts may be resorted to Within the scope of what is claimed Without departing from the spirit of the invention.

I claim:

l. In a double acting pump comprising a cylinder having inlet and outlet apertures in both ends thereof, a piston reciprocally mounted in said cylinder, a piston rod connected to said piston and extending through the upper end of said cylinder, a pair of spaced parallel rack bars attached to said piston rod having teeth on their inner sides, a laterally movable block, a crank shaft supported by said block, a pinion carried by said shaft adapted to alternately engage with the teeth of said rack bars, a spring exerting pressure against said block to move said block to engage said pinion with the teeth of one of said rack bars, and a pivoted lever connected with said block for moving said block against the tension of said spring to engage the pinion with the teeth of the other rack bar.

2. In a double acting pump comprising a cylinder having inlet and outlet apertures in both ends thereof, a piston reciprocally mounted n said cylinder, a piston rod connected to said piston and extending through the upper end of said cylinder, a pair of spaced parallel rack bars connected to the upper end of said piston rod, a guide structure through which said rack bars extend, a block slidably mounted on said guide structure, a crankshaft extending through said block and between said rack bars, a pinion mounted on said crank shaft for alternate engagement with said rack bars, a spring exerting pressure on said block to normally hold said pinion in engagement with one of said rack bars, a pivoted lever connected to said guide structure, and a link connecting said lever with said crank shaft whereby said shaft is moved by said lever to shift said pinion into engagement with the other rack bar.

3. In a double acting pump comprising a cylinder having inlet and outlet apertures in both ends thereof, a piston reciprocally mounted in said cylinder, a piston rod connected to said piston and extending through the upper end of said cylinder, a pair of spaced parallel rack bars connected to the upper end of said piston rod, a guide structure through which said rack bars extend, a block slidably mounted on said guide structure, a crank shaft extending through said block and between said rack bars, a pinion mounted on said crank shaft adapted to alternately engage with said rack bars, a spring exerting pressure on said block to move said shaft to engage said pinion with one of said rack bars, a pivoted lever mounted on said guide structure having connection with said crank shaft for moving said pinion into engagement with the other rack bar, a cross bar on one end of said block, and a pivotally mounted rod having a notch for engagement with said cross bar to hold said block against the tension of said spring whereby said pinion is held in a neutral position.

DANIEL MATHESON. 

